I can connect my little hose up anywhere anytime, It takes up no room in the tool box or bag, it also fits under the pillion seat of the bike, it also doesn't need a power supply.
The only down side is that the air line is only about 1 meter long so you need to to have the supply close to what it is feeding.
Would a compressor be better at supplying air pressure, yes, but would a compressor fit unxer the pillion seat.
It's a great little gadget in my arsenal of handy stuff.
It cost about $5 in fittings to mash it together and it only took 1 can of JD and Cola in time.
Actually, with all this talk, I might make up a nice, non Frankenstein version.
I'm picturing some nice curly line.
I just eBayed, $11.31 for the curly hose and 2 tyre fittings.
http://m.ebay.com.au/itm?itemId=292118785138
http://m.ebay.com.au/itm?itemId=131990468592